You can use -R in Grep for recursive. We can also use -e which is not mandatory. -e is meant for regex for search. Following are the list of commands to search a string with in a directory and all its subdirectories.
Gzip compression is a method of compressing files to make them them smaller so that it will be faster for network transfers. It is a standard practice that we must enable compression for production websites. We can enable gzip compression by adding following set of code in your .htaccess file.